Mechanical movement



(No Model.) 3 Sheets-Sheet 1.

A. TETRAULT. MEGHANICAL MOVEMENT.

No. 892,288. Patented Nov. 8, 1888.

(No Model.) 3 Sheets-Sheet 2.

8.v TETRAULT. MEGHANIGAL MOVEMENT'.

18A-892,238. Patented Nov. 6,- 1888.

MEGHANIGAL MOVEMENT.

Patented Nov. 6

Unire raras AMDE T'IR'AULT, OF ST. PAUL, MINNESOTA.'

MECHANICAL MOVMENT.

SPECIFICATION forming part ofLetters'Patent No. 392,238, dated November6, 1888.

Application filed September 1, 1885.

To all whom t may concern.-

Beit known that I, AMDE TTRAULT, a citizen of the United States, and aresident of St. Paul, inv the county of Ramsey and State of Minnesota,have invented certain new and useful Improvements in MechanicalMovements, of which the following is a specification.

My invention is a new mechanical move. ment whereby I am enabled toeither raise or lower heavy objects or weights by vibrating a singlelever, the reversing movement being effected by changing the extent towhich the lever is vibrated, as fully set forth hereinafter, and asillustrated in the accompanying drawings, in Which- Figure lis aperspective view illustrating my improved mechanical movement. Figs. 2,3, and 4 are side views of the device, showing the parts in differentpositions. Fig. 5 is a plan view, in part section, ofthe said device.

A represents a shaft, the movement of which in opposite directions ismade the means of raising or lowering or reversing the motion of someobject, as a weight, valve,'gate, &c.,con nected directly or indirectlyto the said shaft. For instance, the shaft may carry a pinion gearingwith Ya sliding rack connected to the weight; but I have shown the shaftas carrying a drum, B, round which may be wound a chain, (indicated bythe dotted lines 00,) and passing over a guide-pulley and attached atits lower end to the weight. To prevent the descent of the weight exceptwhen it is to be properly lowered, I secure to the shaft aratchet-wheel,0, and hang a pawl, D, to a shaft,a, so as to engage withthe teeth of the ratchet, the shaft A and the shaft a having theirbearings in a frame, VV'.

In order to turn the shaft, I use a lever, E, pivoted to the shaft A, orat a point adjacent thereto, and carrying a pawl, F, which engagesSerial No. 175,906. (No model.)

acting upon a recessed block, f, receiving an arm, b, upon the pawl,which arm, when the pawl is in contact with the ratchet-teeth, isforward ofthe shaft or pivot a, so that the tendency of the spring whenexerting a downward pressure upon said arm is to force it fartherforward and hold the pawl in contact with the ratchet-wheel.

The spring c may be a flat blade. I prefer, however, to use the spiralspring wound upon a rod, g, extending from the blockf' through across-piece, t', of the frame, as shown. When the pawl D is thrownoutward at the lower end sufficiently to carry the arm b back of thepivot a, as shown in Fig. 3, the expansion of the spring tends to forcethe arm farther back and to hold the pawl out of contact with theratchet in the position shown in Fig. 3. The pawl F, pivoted to thelever E, is acted upon by a spring, c', which tends to hold the saidpawl F in either of two positions in the same manner as does the springc when acting upon the pawl D. Thus the pawl-F is provided with an arm,b', and the spring c bears upon a notched block, f', from which a rod,g', eX- tends through a perforated lug, t', upon the lever E. Then thepawl F is in contact with the ratchet-wheel, the arm b is below thepivot a and the spring e tends to hold the pawl in contact with theratchet-wheel; but when the pawl F is thrown tothe position shown inFig. 4, so as to carry the arm b above the pivot a', the action of thespring tends to raise the arm b and hold the pawl F away from theratchetwheel.

The pawl D is provided with a lug, 7i, which projects laterally beyondthe side of the frame to a position to be struck by a finger, j, uponthe lever E when the latter is turned downward to the position shown inFig. 3, and the pawl D is also provided with a lug, n, and with aprojection, it, having a lower inclined face, y, arranged to be struckby the end of an arm, d, upon the pawl F when the lever E is raised tothe position shown in Fig. et, and the lever is provided with a secondfinger, m, arranged to strike the lug h when the parts are operated, ashereinafter described.

Then it is desired to lift the weight or other object acted upon by theshaft A, the lever E is vibrated between the positions indicated by IOOthe lines c e', Fig. 3, when the pawl F willengage with the teeth ot'the ratchet-wheel and the latter will be turned in the direction of itsarrow as the lever descends, when the pawl l) will engage with the teethand lock the ratchet-wheel in its place as the lever is carried upward.ly thus vibrating the lever between the positions indicated the shaftand its drum may be turned to any desired extent, so as to lift theweight as high as may be required, when the weight will be locked in itsposition after each downward movement of the lever.

lWhen it is desired to lower or reverse the motion of the weight, thelever E is carried below the position indicated by the line c' to thatshown in Fig. 3 coinciding with the line 3", when the iingerj will bebrought in contact with the lug h of the pawl D and will swing thelatter out until the arm b of the pawl passes inward beyond the pivot e,when the pawl will be held free from the ratchet-wheel. If now the leverE is elevated, the action of the weight will hold the teeth s of theratchetwheel in firm contact with the pawl F, and the ratchet-wheel willturn in a direction the reverse of thatindicated by its arrow, so as tounwind the chain and lower the weight. The lever Il is now carried to aposition above that indicated by the line f.' to that indicated by theline e, Fig. I, which action results in bringing the finger m againstthe lug h, as shown in Fig. 2, thereby swinging downward the pawl l) soas to engage with the ratchet-wheel, after which thearm Z of the pawl Fis brought against the inclined face 1/ of the lug 7.', whereby the pawlF is turned to the position shown in Fig. A1, and is held in the saidposition free from contact with the ratchet-wheel C, s0 that the leverluay be carried downward to a certain extent without turning the shaft.As, however, the point of the arm l passes the point l. ofthe lug a, thepawl is swung in the direction of its arrow, Fig. ll, and its end isagain brought in contact with the ratchetteeth, after which a furtherdownward movement of the lever again throws out the pawl I), when theabove-described operations are repeated; but the movement of the partsmay at any time be reversed by first carrying the lever to the positionshown in Fig. -t and vibrated within the positions bounded by the lines.c z.

lo prevent any possible displacement or disconnection of the pawl F fromthe ratchetwheel, after the pawl D has been thrown out io the positionshown in Fig. 3, I so arrange a guard, p, upon the frame that it willextend beneath the pawl F as the lever IG is lowered and prevent it'from falling from contact with the ratchet-wheel teeth.

It will be evident that springs of different constructions may bevariously arranged to throw the pawls to one side or the other of theirpivots and that the contact arms, lugs, or fingers may be of differentshapes and ar` ranged differently, so that by extending the movement ofthe lever in either direction the positions of the pawls will bealtered. I have illustrated the construction shown in the drawings forthe purpose of explaining my invention, and not because it is embodiedof necessity in such an arrangement of parts, although in practicaloperation the construetion and arrangement shown have proved to be mosteffective.

rlhe shaft A. may in some instances be stationary, in which case thedrum or cylinder I) will turn upon the shaft.

I have not illustrated my improved device in connection with anymachine, because it is applicable to very many machines and apparatusesof different kinds wherever it is necessary to raise and lower certainparts, and because it may be used independently of any other machine orapparatus-as, for instance, in raising or lowering water-gates,hatch-covers, &c.

Vithout limiting myself to the precise construction and arrangement ofparts shown, I claim- .1. A mechanical movement consisting of aratchet-wheel, a pawl pivoted adjacent thereto, a lever provided withanother pawl adapted to engage with the ratchet-wheel, springs arrangedto bear respectively upon the pawls and to hold each of. them indifferent positions in and out of Contact with the ratchetwheel, andlugs and fingers, substantially as described, connected with saidpawls,whereby the pawls are adjusted according to theextentofthemovementsofthelcver,substantially as set forth.

2. '.lhe combination of the ratchet C, the pawl l), engaging therewithand provided with lugs 7; h n, a spring bearing upon the pawl andarranged to retain it either in or ont ofcontact with the ratchet, thelever It, a pawl, F, carried thereby and provided with a lug or arm, d,Afingers/I m, and a spring bearing upon the pawl F and arranged toretain it either in or ont of contact with the ratchet, sul'lstantiallyas described.

Il. The eombination,with the ratchet-wheel and lever carrying the pawlF, having an arm,

WM. M. Snrrn, WM. S. Savmzs.

